[mythtv] CVS CPU usage

[steve at nexusuk.org]

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On Sun, 22 Feb 2004, Andrew Mahone wrote:

> I'm not sure what the cause is, I haven't noticed a major myself.  If you're 
> not using any filters of your own, deleting the libadjust.so lib, or moving 
> it to another directory will prevent the filter from loading.  Doing this 
> will also prevent any other filters from loading.  You could try recording 
> with no filters vs with the auto-loaded adjust filter to see if it helps.  I 
> suspect the difference may be something else, though, because when I 
> benchmarked the adjust filter with the default settings, it was quite fast.

Well, I just deleted libadjust.so and the CPU usage of the backend while 
doing live tv (720x576 25fps MPEG4 3300Kbps, 44100 Hz unencoded audio) 
went from pegging the CPU at 100% (with the associated dropped frames and 
complaints about not enough free audio buffers which you get when the 
backend hasn't got enough processor power) down to a healthy 60% without 
changing any other settings...  I'd love to know why it used so much more 
CPU for Live TV - the adjust filter didn't seem to have much effect on the 
CPU used when just recording (640x576 25fps MPEG4 2200Kbps, 44100 Hz MP3 
audio).

- -- 

 - Steve                                             http://www.nexusuk.org/

     Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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